TERMINAL_ENABLE feature doesn't work with Mod-Tap Enter

[chax]

When using TERMINAL_ENABLE feature, and your enter key is configured as Mod-Tap, terminal doesn't output anything except initial prompt. Problem is, enter configured this way is not recognized in process_terminal.c

System Information

• Keyboard:
  Planck rev6
• Operating System:
  Linux Solus
• avr-gcc version:
  avr-gcc (GCC) 8.2.0
• arm gcc version:
  arm-none-eabi-gcc (GNU Tools for Arm Embedded Processors 7-2018-q2-update) 7.3.1 20180622 (release) [ARM/embedded-7-branch revision 261907]
• QMK Firmware version:
  0.6.199
• Any keyboard related software installed?
  • Auto Hot Key
  • Karabiner
  • Other

Additional context

qmk_firmware/quantum/process_keycode/process_terminal.c

Lines 276 to 285 in 42a72c6

	if (keycode < 256) {
	uint8_t str_len;
	char char_to_add;
	switch (keycode) {
	case KC_ENTER:
	push_to_cmd_buffer();
	current_cmd_buffer_pos = 0;
	process_terminal_command();
	return false; break;
	case KC_ESC:

When i configure my enter key in my keymap.c as KC_ENT everything works, but my enter is configured as RSFT_T(KC_ENT) and then it doesn't work. My workaround is to have KC_ENT in Raise layer.

[chax]

KC_PENT also doesn't work